390 
ACTINOPTEKYGir. 
Acrogaster heckeli (Pictet). 
1850. Fycnosterinx heckelii, F. J. Pictet, Poiss. Foss. Mt. Liban, p. 15, 
pi. ii. figs. 1, 2. 
1866. Fycnosterinx heckelii, Pictet Humbert, Nouy. Recb. Poiss. 
I'oss. Mt. Liban, p. 40, pi. iii. figs. 3, 4. 
1887. Fycnosterinx heckelii, J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. iii. p. 532 (? pi. xxvii. fig. 1). 
Type. Imperfect fish ; Geneva Museum. 
A species attaining a length of about 0’08. Length of head with 
opercular apparatus not exceeding the depth of the abdominal region 
below the vertebral column. Maximum depth of trunk about equal 
to its length, and about four times as great as the width of the 
caudal pedicle. Dorsal fin with 3 spines and 14 divided rays, the 
distance between its hinder end and the caudal fin equalling about 
half the length of its own base-line; anal fin with 3 spines and 
9 or 10 divided rays, less extended than the dorsal and arising 
opposite the middle of the latter. 
Form. ^ Log. Upper Cretaceous ; Sahel Alma, Mt. Lebanon. 
47373, 49570-72, P. 6181. Five typical specimens displaying all 
the characters of the genus and species. Lewis Coll. 
46531, 47378, 47813, 48117. Four small specimens, the fourth 
showing traces of the lateral line without thickened or 
enlarged scales. Lewis Coll. 
P. 1955 Fish about 0*07 in length, with displaced upper jaw. 
Egerton Coll. 
P. 1954. V'ery small specimen. Egerton Coll. 
P. 4154-55. Two imperfect specimens, the first displaying a pelvic 
fin. Enniskillen Coll. 
Acrogaster daviesi (Dnvis). 
(?) 1850. Fagellus Uhanicus, F. J. Pictet, Poiss. Foss. Mt. Liban, p. 11, 
pi. i. figs. 2, 3 (named F. ovalis on plate). [Imperfect fish; 
Geneva Museum.] 
1887. Fycnosterinx daviesii, J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. iii. p. 537, pi. xxix. fig. 2. 
(?) 1887. Fagellus Uhanicus, J. W. Davis, ihid. p. 507. 
1895. Acanthophoria libanica, D. G. Kramberger, Djela Jugoslav. Akad. 
vol. xvi. p. 46, pi. viii. fig. 1. 
1898. Fagellus Uhanicus',' A. S. Woodward, Ann. Mag. Nat. Hist. 
[7] vol. ii. p. 488. 
